Means for suspending porcelain insulators



Dec. 19, 1933. P, w. BUXTON MEANS FOR SUSPENDING PORCELAIN INSULATORS Filed Sept. 8, 1930 lnvenTor. Paul W. BuxTon byWWJ f ATTys.

Patented Dec. 19,. 1933 UNITED STATES PATENT OFFICE MEANS. FOR SUSPENDING PORCELAIN INSULATORS Paul W. Buxton, Hudson, N. H., assignor to Wheeler Reflector Company,- Boston, Mass., a corporation of Massachusetts This invention relates to porcelain insulators and particularly to a novel means for connecting a series of insulators or petticoats as they are sometimes termed, in suspended relation.

In accordance with my invention each insulator or petticoat is provided with a recess in its under side and an internally screw-threaded metal ring is cast into the insulator or petticoa in such a way as to form a portion of the side wall of said recess. Each insulator member is also provided with a neck portion adapted to be received in the recess of another insulator member, said neck portion having an external annular groove which is formed at one point with a depression in the bottom thereof and any two insulators are connected with the neck of one insulator occupying the recess-in the bottom of the insulator by means of a two-part.

externally threaded ring which occupies the groove of the neck and has screw-threaded engagement with the internally screw-threaded ring in the other insulator member.

The two-part externally threaded ring is provided with an inwardly-directedprojection to fill the depression and, therefore, prevent it from rotating relative to the neck.-

In order to give an understanding of my'invention I have illustrated herein. a selected embodiment thereof which will now be' described after which the novel features of the invention will be pointed out in the appended claim.

In the drawing, Fig. 1 is a sectional view showing my invention as applied to a strain insulator for use on high'tension circuits;

Fig. 2 is an enlarged section on the. line 2-2, Fig. 1; f

Fig.3 is a view of the split ring with a portion thereof broken out.

Fig. 1 is a sectional view showing how the in- 40 vention may be applied in supporting the sections or petticoats of a high tension insulator.

In this embodiment the neck 12 of the upper petticoat member 13 is provided with a groove 14 adapted to receive a split ring 15 comprising the two parts, 7a, 7b, and this-split ring is shown as screw-threaded into the bell-shaped supporting'member 16.

For connecting a second petticoat member 17 to the petticoat member 13 said member 50 13 is provided on its underside with a recess 18 to receive the neck 19 of the second petticoat member 1'7. This recess is provided with an internally screw-threaded ring 20 which may be cast into the petticoat member when the latter is formed. The petticoat member 17 is provided with an externally-threaded split ring 21 which is adapted to be screw-threaded into the supporting ring 20, said ring 21 being received in a groove 14 formed in the neck 19 I ofthe lower petticoat member 17.

Each groove 14 is formed in its bottom with so recesses 11 and each of the two-parts 7a, "7b of the split ring 15 as well as each of the two parts of the split ring 21 is provided with a lug or projection 10 adapted to fit into the recesses 5 11 as shown in Fig. 2. The interlocking engagement of the projection 10 in the recesses 11 serves to prevent either the split ring 15 (that is,

the two parts 7a, 7b, or the split ring 21) from turning on the neck of the petticoat when said petticoat is screwed into either the canopy'lfi or the internally screw-threaded ring 20 of another petticoat.

The meeting ends of each of the split rings 15 or 21 have an interlocking engagement as shown 76 in Fig.3 wherein the end of the section 7a of the split ring is provided with a tongue 8 that is received in a recess 9 formed in the meeting end of the section 7b.

By means of this same construction any de- 80 sired number of petticoat members may be connected one to the other.

The lower petticoat member has the recess 22 in which is located an internally threaded ring 23 similar to the ring 20. A suspending member'24 is screw-threaded into the ring 23.

My invention, therefore, provides a. simple means for connecting the different sections or Petticoats of a high tension insulator. The invention is also equally applicable for connecting other types of porcelain insulator members.

I claim.

An insulator construction comprising two insulator members, one of which has a recess in its under side, an internally screw-threaded metal ring which is case into said insulator member and'which forms a portion of the side wall of said recess, the other insulator member having a neck portion adapted to be received in said recess, said neck portion having an external annular groove which is formed at one point with a depression in the bottom thereof, a two-part externally-threaded ring occupying said groove and screw threaded into said internally screwethreaded ring, said two-part externally threaded ring having an inwardly-directed projection filling said depression, the meeting ends of the two parts of said externallythreaded ring having interlocking engagement.

PAUL W. BUXTON. 

